OPERATION MANUAL CompoBus/S

Precautions for Replacement of Units or Parts Section 6-7
Note Acceptable humidity range with no condensation or frost.
6-7 Precautions for Replacement of Units or Parts
6-7-1 Precautions for Unit Replacement
The CompoBus/S Master Unit and Slave Units make up the system. The
entire system is affected when a Unit is faulty, so a faulty Unit must be
repaired or replaced quickly. We recommend having spare Units available to
restore operation as quickly as possible.
Observe the following precautions when replacing a faulty Unit.
After replacement make sure that there are no errors with the new Unit.
When a Unit is being returned for repair, attach a sheet of paper detailing
the problem and return the Unit to your OMRON dealer.
If there is a faulty contact, try wiping the contact with a clean, lint-free
cloth dampened with alcohol. Re-mount the Unit after cleaning off any lint.
!Caution To prevent electric shock when replacing a Unit, be sure to turn OFF the
power supplies to all of the nodes (Master and Slaves) before removing the
faulty Unit.
6-7-2 Settings after Unit Replacement
6-7-3 Replacing Relays
Unit Acceptable temperature Acceptable humidity*
Sensor Terminal 0 to 55°C 35% to 85%
Fiber Amplifier Communications
Unit
–20 to 55°C 35% to 85%
Connector Terminal –10 to 55°C 25% to 85%
Water-resistant Terminal –10 to 55°C 25% to 85%
Analog Terminal –10 to 55°C 25% to 85%
CPM1A/CPM2A I/O Link Unit 0 to 55°C 10% to 90%
CPM2C I/O Link Unit 0 to 55°C 10% to 90%
After replacing a Unit, set the new Unit’s switches to the same settings that
were on the old Unit.
!Caution When the CPU Unit has been replaced, transfer any required DM Area or HR
Area data to the new CPU Unit before restarting operation.
Faulty relays or power MOSFET relays in Remote Terminals can be removed
and replaced.
!Caution Be sure to turn OFF the Slave’s power supply before removing the faulty relay
to prevent electric shock.
The relay’s pins often bend or break when the relay is removed, so remove
faulty relays only.
Remote Terminal Relays Use the following procedure to replace a relay in an Remote Terminal.
1,2,3... 1. The relay removal tool attached to the Remote Terminal is used to remove
the relay. Align the relay removal tool so that it squeezes the old relay, push
it all the way in, and pull it out to remove the relay.
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